Eliminate Food Waste
Sophie Uliano, Julia Roberts and Oprah
With three young children at home, Hollywood mom Julia Roberts says her family used to waste a lot of leftover food. "I [used to] just cry and scrape plates and think, 'How can I be doing this?'"

Thanks to her eco-conscious friend Sophie Uliano, author of Gorgeously Green, Julia says she discovered a way to put her waste to good use—composting. "I do love composting," she says. "This is one of the things that Sophie has really been on me about."

Sophie says it's easy to turn leftover fruits, veggies, grains and paper products into compost, a natural alternative to commercial fertilizer. "You can turn your waste into gold—literally brown gold," Sophie says. "It's the most nutritious thing that you can put in your garden."